46 CALIFORNIA ACADEMY OF SCIENCES. 



XIX. Hemifsilichthys gen. no v. 

 Xenomystus Liitken, preoc. 



93. Hemipsilichthys gobio (Lutken.) 



Locality: Tarahyba. 



XX. AcANTHicus Spix. 



DOUBTFUL SPECIES. 



Hypostomus vicinus Castelnau. 



94. Acanthicus hystrix Spix. 



Bhhielepis acanlhicus Ciiv. & Val. 

 Locality: Para. 



95. Acanthicus genibarbis (Cuv. & VaD. 



XXI. CHiETOSTOMUS Kner. 



96. Chgetostomus jelskii SteiDdachner. 



97. Chgetostomus latifrons Giinther. 



98. Chaetostomus macrops Liitken. 



99. Cha3tostomus stannii Kroyer. 



100. Chaetostomus taczanowskii Steiudacbner. 



101. Chaetostomus tectirostris Cope. 



102. Chaetostomus variolosus Cope. 



103. Chaetostomus nudirostris Liitken. 



104. Chaetostomus guairensis Steindachner. 



105. Chaetostomus sericeus Cope. 



106. Chaetostomus malacops Cope. 



107. Chaetostomus branickii Steindachner. 



108. Chaetostomus fisheri Steindachner. 



109. Chaetostomus loborhynchus Tschudi. 



110. Chaetostomus dermcrhynchus Boulenger. 



111. Chaetostomus microps Giinther. 



112. Chaetostomus nudiceps Mniier & Tro.chel. 



113. Chaetostomus erinaceus Cuv. & Val. 



114. Choetostomus bufonius Cnv. & Val. 



115. Chaetostomus gymnorhynchus Kner. 



